998732123 has 2 divisors, whose sum is σ = 998732124. Its totient is φ = 998732122.

The previous prime is 998732071. The next prime is 998732143. The reversal of 998732123 is 321237899.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998732123 - 2²⁴ = 981954907 is a prime.

It is not a weakly prime, because it can be changed into another prime (998732143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499366061 + 499366062.

It is an arithmetic number, because the mean of its divisors is an integer number (499366062).

Almost surely, 2^998732123 is an apocalyptic number.

998732123 is a deficient number, since it is larger than the sum of its proper divisors (1).

998732123 is an equidigital number, since it uses as much as digits as its factorization.

998732123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The square root of 998732123 is about 31602.7233478382. The cubic root of 998732123 is about 999.5771955950.

The spelling of 998732123 in words is "nine hundred ninety-eight million, seven hundred thirty-two thousand, one hundred twenty-three".